Each of the following has a better chance of influencing gene frequencies in small populations than in large populations, but which one most consistently requires a small population as a precondition for its occurrence?
A) Mutation
B) Non-random mating
C) Genetic drift
D) Natural selection
E) Gene flow
Answer: C) Genetic drift
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Figure 5-17 shows the approximate Km for the hydrolysis of ATP by helicase PcrA to be:
A. 3 µM. B. 5 µM. C. 10 µM. D. 15 µM. E. 20 µM.
Once organisms are classified as to their domain, there are still millions of different species in each domain. Subdividing them even further makes it easier to understand their relationships to each other. A domain is divided into more subgroups until genus species is reached. Which of the groups listed is the broader group (contains more members)?
A. Order. B. Class. C. Family. D. Phylum. E. Kingdom.
Based on the pollen to ovule ratios, which statement appears to be true?
a. Species A probably distributes its pollen via the wind. b. Species B probably distributes its pollen via the wind. c. The pollen from species B is probably distributed by animals. d. Both species probably distribute their pollen via the same method
Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. Where will the virus be while dormant in the nerve cell?
a. Floating in the nerve cell cytoplasm b. Integrated in the nerve cell chromosomes c. In the nerve cell membrane d. Floating outside of the nerve cell, waiting to reinfect it e. In the blood